In Pokémon Black 2 & White 2, like the past games, the trainer card changes colour based upon the various achievements you have accomplished within the game. There are six different colours for the Trainer Card, each dependant on the amount of Stars on your card. The colours are as follows

Start

Stage 1

Stage 2

Stage 3

Stage 4

Stage 5

Blue

Purple

Orange

Silver

Gold

Black/White

These changes are done by following these instructions in any order.

Defeat the Elite Four

Complete National Dex

Complete all PokéStar Studio Movies

Defeat the Champions within the Pokémon World Tournament

Gain Entree levels of 30 for Black & White

The Trainer Card - Front & Back

First, the Trainer card still has the option where you can select your trainer nature. On the front, you'll get details on the amount of Pokémon you have seen in your Pokédex as well as the amount of money you have on you in the game. On the back, you get your ID number, the game time and the date you began your Pokémon journey.

In addition to that, you have a signature strip which you can write on. You have the ability to zoom in on this part and you can even make a two frame animation out of the two halves of the signature strip.

New to Pokémon Black 2 & White 2 is the ability to include on of the medals you have earned. This is done by selecting them within the Medal Box. It can then be accessed by tapping the medal icon.

Finally, another feature to the back of the Trainer Cards is a list of statistics. These statistics track various parts of the game and have loads of new ones in Black 2 & White 2

Date journey began

Date first defeated Elite Four

Number of Multiplayer Connections

Number of Multiplayer Battles

Number of Multiplayer Battle Wins

Number of Multiplayer Battle Losses

Number of Multiplayer Trades

Number of wild Pokémon encountered

Number of Trainers battled

Amount of times you've used Feeling Check

Number of people Passed By

Amount of usable Pass Powers

Amount of Funfest Missions completed

Amount of PokéStar Studio Movies completed

Amount of Pokémon World Tournament wins

Number of people guided in Join Avenue

The Trainer Card - Badges

In addition to the trainer card, you have the option to open and view your badge case. Like the badges in Pokémon Diamond, Pearl & Platinum, you have the ability to tap these badges and with that, you can polish them so they have a nice glint on them.

When you select the badge, you get a view of the Gym Leader as well as details on what the badge unlocks and the date in which you defeated the Gym Leaders.